I use it sometimes still:
http://linuxcommand.org/lc3_adv_mc.php
Made by the guy who wrote WinRAR (and RAR format)[2].
[1]https://www.farmanager.com/screenshots.php?l=en
[2]https://en.wikipedia.org/wiki/Eugene_Roshal
There's a plethora of dual pane file managers. I like fman (cross-platform), which is a bit akin to Sublime Text.
I use it sometimes still:
http://linuxcommand.org/lc3_adv_mc.php